The miner names are based on the strength of the super powers of a comic book hero and the speed of the miner.

From weakest to strongest.

Fury, normal human, has no super power but runs SHIELD.

Black Widow, skilled woman in martial arts and weapons.

Falcon has powered wings.

War Machine, a military suit built by Iron Man. It comes with an arc reactor.

Big Gun, Cyborg?

They secure the block chain of scrypt coins and maintain stability.